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3 years ago

A tank is 3 m long 1 m wide and 0.5 m deep is filled with oil which weighs 12000 N

1 answer:

5 0

Area of the bottom = L x W = 3 x 1 = 3 square meters. Pressure = force/area = 12000/3 = 4000 N/square meter = 4 kPa. Since we know the weight of the oil, we don't need to know the depth.

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A 56 kg astronaut stands on a bathroom scale inside a rotating circular space station. The radius of the space station is 250 m.

Zielflug [23.3K]

Answer:

The speed of space station floor is 49.49 m/s.

Explanation:

Given that,

Mass of astronaut = 56 kg

Radius = 250 m

We need to calculate the speed of space station floor

Using centripetal force and newton's second law

$F=mg$

$\dfrac{mv^2}{r}=mg$

$\dfrac{v^2}{r}=g$

$v=\sqrt{rg}$

Where, v = speed of space station floor

r = radius

g = acceleration due to gravity

Put the value into the formula

$v=\sqrt{250\times9.8}$

$v=49.49\ m/s$

Hence, The speed of space station floor is 49.49 m/s.

6 0

3 years ago

Do you think climate change is affecting our seasons? Why or why not? Share the links you found that support your theory.

mestny [16]

Answer:

Yes, it is. The summers and the winters are getting warmer. Also in cold places like Alaska, the temperatures are rising.

Explanation:

6 0

4 years ago

Two obiect accumulated a charge of

tamaranim1 [39]

Answer:

A. 181.24 N

Explanation:

The magnitude of hte electrostatic force between two charged objects is given by the equation

$F=k\frac{q_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1, q2 are the magnitudes of the two charges

r is the separation between the charges

In this problem, we have:

$q_1=4.5\mu C=4.5\cdot 10^{-6}C$ is the magnitude of the 1st charge

$q_2=2.8\mu C=2.8\cdot 10^{-6}C$ is the magnitude of the 2nd charge

r = 2.5 cm = 0.025 m is the separation between the charges

Therefore, the magnitude of the electric force is:

$F=\frac{(9\cdot 10^9)(4.5\cdot 10^{-6})(2.8\cdot 10^{-6})}{(0.025)^2}=181.44 N$

So, the closest answer is

A) 181.24 N

3 0

4 years ago

A toy remote car drives in a circle. It makes 2 revolutions in 20 seconds. What is the period of the object?

seraphim [82]

Answer:

T = 10 seconds

Explanation:

Given that,

A remote car makes 2 revolutions in 20 seconds.

We need to find the period of the object.

It means, it will make $\dfrac{2}{20}=0.1\ \text{revolutions/second}$ .

lt T be the period of the object. So,

$T=\dfrac{1}{0.1}\\\\T=10\ s$

It will take 10 seconds for one revolution.

5 0

3 years ago

What are the SI base units of the newton?

siniylev [52]

Answer:

1 kg⋅m⋅s−2

Explanation:

8 0

3 years ago

Read 2 more answers